That is nothing new. At the UCDavis Veterinary School museum there are quite a few similar 2 headed, mutilegged specimens dating back to the early1950's when the Vet school was first established. I personally enbalmed a 2 headed new born kitten there back in 1966. At the UCD Anatomy Dept., Matilda the 7 toed cat,( she was their mascot and kept all the stored bones and preserved specimens' boxes in the storage warehouse rooms mouse free) produced 2 litters a year of 7-9 toes on each leg kittens throughout the 1960s. All of these kittens were adopted by the Vet students. While in high school, I worked for Dr. Gregory at UCD Animal Sciences dept. where he had a herd of about a 100 dwarf cattle with every gross skeleton and muscular malformation emaginable in the late 1950's. Many had so severe malformations ( heads as big as basketballs, off set eyes, ,2 mouths, 5-6 legs , severly deformed vertebras, etc.) that the only way they could be born was with C- sections which I assisted in. I have personally seen several dozen live chicks to adults == chicken x pheasant and turkey x pheasant birds at the UCD Avian Sciences dept. in the early 1960's. They had a crossbreeding project to see if these crossbreds could be of commercial use... while quite a few eggs had early developing embryos, most didn't hatch, so not of any commercial interest. That was at a time when the genetic engineering wasn't even possible.